Search
Now showing items 1-3 of 3
On constant-sign periodic solutions in modelling the spread of interdependent epidemics
(Cambridge University Press (CUP), 2006-01-01)
We consider the following model that describes the spread of n types of epidemics which are interdependent on each other:
u(i)(t) = integral(t)(t-r) g(i)(t, s) f(i) (s, u(1)(s), u(2)(s),..., u(n)(s))ds, t is an element of ...
Positive and maximal positive solutions of singular mixed boundary value problem
(Walter de Gruyter GmbH, 2009-01-01)
The paper is concerned with existence results for positive solutions and maximal positive solutions of singular mixed boundary value problems. Nonlinearities h(t;x;y) in differential equations admit a time singularity at ...
Fourth-order problems with nonlinear boundary conditions
(Elsevier BV, 2005-02-01)